How URL Logging works?

Evening Martin
After thinking about it more I figured that port 514 UDP is syslog so have set up an HD4 to log back to a Synology RS814.
This is been done in the following situation
HD4 in France on 3x cellular - SpeedFusion to Ireland - Breakout to internet - Synology Server in France
It is working because I’m seeing the Syslog file growing in size but can’t seam to be able to make any sense of the file!
Any time on 6.3 for FusionHub?
Thanks!